"My favorite piece of research from all the happiness research I’ve read is that self-discipline snowballs. That is, if you can work hard to have self-discipline in one, small area, you create self-discipline almost effortlessly in other areas. The most famous study about this phenomena is from Baumeister, who found that students who walked with a book on their head to fix their posture ended up eating better, studying harder, and sleeping more. Without even noticing they were making those changes. " - Fred Yankowski